Henri schneider



(No Model.)

E. SCHNEIDER. GAS CHECK POR ORDNANGB.

No. 427,370. Patented May 6, 1890.

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Q70 @BMW I l I Arron/vm? UNITED STATES PATENT OFFICE.

HENRI SCHNEIDER, OF CREUSOT, FRANCE.

GAS-CHECK FOR ORDNANCE.

SPECIFICATION forming part of Letters Patent No. 427,370, dated May 6, 1890.

Application tiled January 30, 1890. Serial No. 338,658. (No model.) Patented in England November 13, 1889 No. 18,158.

To all whom it may concern.,-l

Be it known that I, HENRI SCHNEIDER, a citizen of the Republic of France, and a resident of Creusot, Sane et Loire, France, have invented Improvements in Gas-Checks or Obturators for' Breech-Loading Ordnance, of which the following is a specification. This application for a patent relates to what may be termed a composite obturator, participating simultaneously in the properties of the Broadwell ring and of the plastic obturator, providing a perfect closure under any pressure, and enabling the'breech-screw to be worked with the greatest ease. This composite obturator is illustrated in the accompanying drawings referred to in the following description.

Figure l represents in section an obturator applied to a movable breech with a movable head C, free upon the stem A, attached to the breech-screw B. Fig. 2 representsthe obturator applied to a movable breech with amovable head C, made in one with the stem A of the breech-screw I3.

This composite obturator comprises a plastic ring or pad D, two hat washers R and S, two split rings E and E', and four elastic rings F F G G in one piece, the whole being inter-y posed between the movable head C and the breech-screw I3. The plastic ring D, composed of asbestus and mutton-fat in the usual proportions, is inclosed between the two washers R and S, one of which-the front one-is provided with split rings E and E.. The washers R and S are made of any suitable metal; but preferably the front washer is of red copper and the back washer of steel. Their peculiarity lies in their be'ing hat and presenting no rim or projection, either inside or on the outside, except in the special case illustrated in Fig. 2, where the front washer follows the profile of the rounded part connecting the stem A to the Inovable head C. In this case the corresponding elastic ring Gr is dispensed with. The rings F F G G in one piece are of triangular or other section and are composed of cold-hammered red copper or any other metal possessing a high degree of elasticity. Their function is to support the external and internal edges of the plastic ring or pad D. The outer rings are connected to the washers R and S by means of a very shallow undercut groove which retains them freely in position. Between the obturator thus constituted and the sides or surfaces of the breech-chamber a vacancy or small amount of play is provided to the eX- tent of from about O mill l to O mill 2. The same amount of play is allowed between thc obturator and the stem A. This arrangement greatly contributes to ease the opening and closing of the breech. Under the influence of the pressure of the gases resulting from the combustion of the powder when a shot is red the plastic ring D,being pressed between the movable head C and the breech screw, is

slightly flattened and expands transversely.` x

the surfaces of the joint. IVhen the pressure ceases, the `elastic rings return to their original formand the play of from O mill Ito O mill 2 reappears in the chamber and around the stem, thus enc bling the breech to be opened with the same ease with which it was closed before iiring.

In conclusion, it is evident that this composite obturator can be constructed of any sizes, so as to be applicable to breech-loading ordnance of any caliber.

I claim as my invention-'- 1. The composite obturator or gas-check for the breech-screws of guns, said check consisting of two flat washers and an intermediate plastic ring, with rings at the joints to prevent exudation of the plastic material, all substantially as described. j

2. The combination of the movable head and movable breech-screw of a gun withthe composite obturator or gas-check between the said head and screw, the said check consisting of two fiat washers and an intermediate plastic ring, with rings at the joints to prevent eXudation of the plastic material, all substantially as described.

3. The composite obturator or gas-check IOO vIO

adapted to be placed between the movable head and movablebreech-screw of a gun and on the stem, and consisting of two flat washers, an intermediate ring of plastic material, elastic rings to make joints at the sides of the chambenand similar elastic rings to make joints with the Vsaid stem and prevent exndation of the plastic material, all substantially as described.

4. The composite obturator or gascheck adapted to be placed between the movable head and movable breech-screw of a gun and on the stern, and consisting of two Hat washers, an intermediate plastic ring, a split ring HENRI SCHNEIDER. Witnesses:

CHARLES BRPORE, LoN FRANOKEN. 

